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Finding the Fourth Proportional to 567.90, 783.45 and 346.95

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Solution

The fourth proportional to 567.90, 783.45 and 346.95 is: 478.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.90 : 783.45 = 346.95 : x
  2. Step 2: Convert to fraction form
    567.90/783.45 = 346.95/x
  3. Step 3: Cross multiply
    567.90x = 783.45 × 346.95
  4. Step 4: Simplify right side
    567.90x = 271,817.98
  5. Step 5: Solve for x
    x = 271,817.98/567.90
  6. Step 6: Final answer
    x = 478.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.